Pulley-block.



B. C BALLJ PULLEY BLOCK.

APPLICATION FILED OCT- 7 1914.

1 1%,11 Patented July 6, 1915.

Wi twe/ywo v i oration.

PULLEY-BLocK.

Specification of Letters Patent.

Patented July 5, 1935.

Application filed October 7, 1914. Serial No. 865,578.

To all whom it may concern:

Be it known that I, BERT C. BALL, a citizen of the United States,residing at Portland, in the county of Multnomah and State of ()regon,have invented new and useful Improvements in Pulley-Blocks, of which thefollowing is a specification.

This invention relates to pulley blocks.

and consists in certain improvements in the construction thereof as willbe hereinafter fully described and pointed out in the claims.

More particularly the block is designed for cable ways wherein cablesare being passed through the block at very high speed in the operationof the hoisting or carrying devices.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 shows a section on the line 11 in Fig. 2. Fig. 2 a sideelevation of the pulley block. Fig. 3 a plan view.

The pulley wheel 1 is mounted on .a bearing pin 2, the bearing pinextending through the perforations 3 in the block sides- 4. The bolt 5extends through the bearing pin 2 and is secured in place by a nut 6.The block sides have the upwardlyextending ribs 77 which terminate incars 8-8. The shackle 9 in the form of a loop termiynates in the eyes10. These eyes are adapted to extend between the perforated ears 88 oneach side and have perforations which register with the perforations inthe ears 88. 'A guard 11 is U-shaped, the arms of the guard 'extendingalong the sides of the ears 8-8. The guard has perfora-.

tions which are adapted to register with the perforations in the ears 8-8; Pins 11, preferably removable pins, extend through the perforationsin the guard,' ears and eyes, thus locking the block sides, guard andshackle together. This makes a very compact and yet a very simple andvery strong construction. If it is desired to open the shackle, the pinon the closed side of the guard may be withdrawn when the loop of theguard will retain the block side in lace.

here high speed cables are used difiiculty is experienced in theirfouling with the pulley block. The block sides have the I cheeks 13-13forming guides for the pulley block. These are provided with the annularribs 14L14 extending from the periphery of the pulley. I also have theupward extensions 15 in the upper edge of the cheeks 13 forming slots 16into which the ard extends. The projections 15 overlapplng in this waythe guard prevent the fouling of the cable in the corner between theguard and the cheeks 13.

What I claim as new is 1. In a pulley block, the combination of asheave; block sides between which the sheave is journaled, said blocksides having cheeks extending thereon and upwardly extending ribsterminating in perforate/61' ears above the cheeks; a shackle looptermlnating 1n eyes arranged between the ears; a U-shaped guardencircling the ears on one of the block sides and extending along the ashackle loop terminating in eyes arranged between the ears; a U-shapedguard encir- -85 cling the ears on one of the block sides and extendingalong the sides of the ears on both block sides and downwardly saidslots in the cheeks and having perforations registering with theperforations in the ears;

and pins extending through the guard, ears and shackle.

. 3. In a pulley block, the combination of a sheave; block sides betweenwhich the sheave is journaled, said'block sides having cheeks extendingthereon and upwardly extending ribs terminating in perforated-ears"above the cheeks, the cheeks h'avin downwardly extending slots adjacentto t re ears a shackle loop terminating in eyes arranged between the.ears; guard plates along the In testimony whereof I have hereunto set isides of the earsand extending downwardly my hand in the presence of twosubscribing into the slots'in the cheeks, said guard plates witnesses.having perforations registering with the BERT C. BALL. g perforations insaid. ears; and pins extend- Witnesses:

ing through said guard plates; ears and HOMER V. CARPENTER, shackle; ,J.F. BRUENING.

